Jean I D'Avesnes
Jean I was born in April 1218 in Houffalize, Luxembourg, Belgium.  He died at the age of 39 on December 24th, 1257 in Valenciennes, Nord, France.

 Countess of Avesnes Aleida
Countess of Avesnes was born about 1226 in Hertogenbosch, Noord-Brabant, Netherlands.  She died on April 9th, 1283 in Valenciennes, Nord, France.

 Jean II D'Avesnes
Jean II was born about 1247 in Brabant, Brabant, Belgium.  He died on August 22nd, 1304 in Valenciennes, Nord, France.

 Baudouin D'Avesnes
Baudouin was born about 1249.

 Bouchard II D'Avesnes
Bouchard II was born on May 26th, 1251.

 Guy D'Avesnes
Guy was born about 1253.

 Guillaume D'Avesnes
Guillaume was born in 1254.

 Floris D'Avesnes
Floris was born in 1255.

 Jeanne D'Avesnes
Jeanne was born in 1256.